On Mon, Aug 6, 2012 at 2:31 PM, Albert Saribekyan <albertsaribekyan at rambler.ru> wrote: > GRASS 6.4.2RC2 (newlocation):~ > g.region > g.region: error while loading shared libraries: libgeos-3.1.0.so: cannot > open shared object file: No such file or directory You need to install the "geos" library package for your system. Markus